(19)
(11) EP 1 087 557 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.01.2005 Bulletin 2005/03

(43) Date of publication A2:
28.03.2001 Bulletin 2001/13

(21) Application number: 00120685.3

(22) Date of filing: 21.09.2000
(51) International Patent Classification (IPC)7: H04H 1/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 22.09.1999 JP 26861899
07.03.2000 JP 2000061479

(71) Applicant: Matsushita Electric Industrial Co., Ltd.
Kadoma-shi, Osaka 571-8501 (JP)

(72) Inventors:
  • Muraki, Kenji
    Osaka-shi, Osaka 533-0013 (JP)
  • Tanaka, Keiko
    Hirakata-shi, Osaka 573-0018 (JP)
  • Ejima, Naoka
    Hirakata-shi, Osaka 573-1102 (JP)
  • Nakajima, Yasushi
    Neyagawa-shi, Osaka 572-0832 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) Apparatus for transmitting digital audio data and receiving apparatus for receiving the digital audio data


(57) In transmission of digital audio data usingIEEE1394, for example, when the audio data is changed from linear PCM to nonlinear PCM, identifier adding means of the transmitting apparatus inserts a silent identifier and nearly zero data for a specific time, and first identifier distinguishing means of the receiving apparatus changes over the output of data processing selecting means from linear PCM processing side to nonlinear processing side when detecting the silent identifier, thereby preventing generation of noise when changing over the data.






Search report